1. The hydraulic efficiency of an impulse turbine is the ? ratio of the actual power produced by the turbine to the energy actually supplied by the turbine ratio of the actual work available at the turbine to the energy imparted to the wheel ratio of the work done on the wheel to the energy of the jet none of the above Answer: ratio of the work done on the wheel to the energy of the jet Explanation: View Answer Discuss in Forum Report Question

 2. A Pelton wheel is ? tangential flow impulse turbine inward flow impulse turbine outward flow impulse turbine inward flow reaction turbine Answer: A-tangential flow impulse turbine Explanation: View Answer Discuss in Forum Report Question

 3. The undershot water wheels are those in which ? the wheel runs entirely by the weight of water the wheel runs entirely by the impulse of water the wheel runs partly by the weight of water and partly by the impulse of water none of the above Answer: the wheel runs entirely by the impulse of water Explanation: View Answer Discuss in Forum Report Question

 4. The hydraulic efficiency of an impulse turbine is maximum when velocity of wheel is ......... of the jet velocity ? one-fourth one-half three-fourth double Answer: one-half Explanation: View Answer Discuss in Forum Report Question

 5. Which of the following is not an impulse turbine ? Girad turbine Turgo turbine Pelton wheel Kaplan turbine Answer: Kaplan turbine Explanation: View Answer Discuss in Forum Report Question

 6. In a reaction turbine, the draft tube is used ? to run the turbine full to prevent air to enter the turbine to increase the head of water by an amount equal to the height of the runner outlet above the tail race to transport water to downstream Answer: to increase the head of water by an amount equal to the height of the runner outlet above the tail race Explanation: View Answer Discuss in Forum Report Question

 7. In a Kaplan turbine runner, the number of blades are generally between ? 2 to 4 4 to 8 8 to 16 16 to 24 Answer: 4 to 8 Explanation: View Answer Discuss in Forum Report Question

 8. The runaway speed of a hydraulic turbine is the speed ? at full load at which there will be no damage to the runner corresponding to maximum overload permissible at which the turbine will run freely without load Answer: at which the turbine will run freely without load Explanation: View Answer Discuss in Forum Report Question

 9. The flow ratio of Francis turbine is defined as the ratio of the ? velocity of flow at inlet to the theoretical jet velocity theoretical velocity of jet to the velocity of flow at inlet velocity of runner at inlet to the velocity of flow at inlet none of the above Answer: velocity of flow at inlet to the theoretical jet velocity Explanation: View Answer Discuss in Forum Report Question

 10. Which of the following statement is correct ? In an impulse turbine, the water impinges on the buckets with pressure energy In a reaction turbine, the water glides over the moving vanes with kinetic energy In an impulse turbine, the pressure of the flowing water remains unchanged and is equal to atmospheric pressure In a reaction turbine, the pressure of the flowing water increases after gliding over the vanes Answer: In an impulse turbine, the pressure of the flowing water remains unchanged and is equal to atmospheric pressure Explanation: View Answer Discuss in Forum Report Question